TY - JOUR
T1 - Long-term operating characteristics of Japan's first in-grid HTS power cable
AU - Nakano, Tetsutaro
AU - Maruyama, Osamu
AU - Honjo, Shoichi
AU - Watanabe, Michihiko
AU - Masuda, Takato
AU - Hirose, Masayuki
AU - Shimoda, Masahiro
AU - Nakamura, Naoko
AU - Yaguchi, Hiroharu
AU - Machida, Akito
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) – Japan.
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/5/8
Y1 - 2015/5/8
N2 - Tokyo Electric Power Company, Sumitomo Electric Industries, Ltd and Mayekawa Mfg. Co., Ltd have jointly conducted the first in-grid demonstration test of a high-temperature superconducting (HTS) cable in Japan, from FY2007 to FY2013. The objective of this project is to evaluate the reliability, stability and other characteristics of the system. The cable structure used in this project is the type of three-in-one cable. As a coolant, sub-cooled liquid nitrogen flows through the gap between the corrugated cryostat and the three cable cores. This structure can realize compactness and reduce heat invasion compared with three single-core HTS cables housed in separate cryostats. The cooling system consists of six refrigerators, two circulation pumps and a reservoir tank. Each refrigerator has a cooling power of 1.0 kW at 77 K, 0.8 kW at 67 K. The number of operating refrigerators is controlled so that the coolant temperature at the cable inlet is kept to preset value. The HTS cable was connected to the live electricity grid from October 29, 2012 to December 25, 2013. In-grid operation continued for more than one year without any accidental interruption of operation or other operating issues. During this time, we studied the operating performance of the HTS cable in dependence on the sub-cooled LN2 temperature.
AB - Tokyo Electric Power Company, Sumitomo Electric Industries, Ltd and Mayekawa Mfg. Co., Ltd have jointly conducted the first in-grid demonstration test of a high-temperature superconducting (HTS) cable in Japan, from FY2007 to FY2013. The objective of this project is to evaluate the reliability, stability and other characteristics of the system. The cable structure used in this project is the type of three-in-one cable. As a coolant, sub-cooled liquid nitrogen flows through the gap between the corrugated cryostat and the three cable cores. This structure can realize compactness and reduce heat invasion compared with three single-core HTS cables housed in separate cryostats. The cooling system consists of six refrigerators, two circulation pumps and a reservoir tank. Each refrigerator has a cooling power of 1.0 kW at 77 K, 0.8 kW at 67 K. The number of operating refrigerators is controlled so that the coolant temperature at the cable inlet is kept to preset value. The HTS cable was connected to the live electricity grid from October 29, 2012 to December 25, 2013. In-grid operation continued for more than one year without any accidental interruption of operation or other operating issues. During this time, we studied the operating performance of the HTS cable in dependence on the sub-cooled LN2 temperature.
KW - Cooling system
KW - High-temperature superconducting cable
KW - In-grid operation
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U2 - 10.1016/j.physc.2015.04.010
DO - 10.1016/j.physc.2015.04.010
M3 - Article
AN - SCOPUS:84944514972
SN - 0921-4534
VL - 518
SP - 126
EP - 129
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
ER -